Smaller cities have lesser people which means that there may not be a market for certain goods and services or at least the market would not be large enough to sustain the production of these goods and services.
For these reason, these smaller cities would focus on providing basic needs which there will be a market for regardless of the population. In the big cities where there is a market for much more goods and services, these goods and services will be offered to capitalize on this demand.
Because America was founded on a promise of freedom and the citizens of America still love the freedom and don't want communism where the people don't have freedoms.
